Generating plant



I I a 1,639,737 233 l. KELLY GENERATING PLANT Filed Aug; 19, 1922 4 Sheets-Sheefl gnalenicm Leo I. Kelly Aug. 23, 1927, L l KELLY GENERATING .PLANT l WI 4 Sheets-Sheet 2 r 7 Filed Aug. 19, 1922 Loo Kz I. KELLY GENERATING PLANT Aug. 23, 1927.

Filed Aug. 19, 1922 4 Sheets-Sheet 3 I nQenta'z L $0 I. Km 1 l Cfumm 1,639,737 Aug. 1927- L. I. KELLY GENERATING PLANT Filed Aug. 19, 1922 4 Sheets-Sheet 4 nalenia l L e.o 1 Kelly Patented Aug. 23, 1927.

LEO I. KELLY, or DETROIT, MICHIGAN.

GENERATING PLAN '1.

Application filed August 19, 1922. Serial 110. 582,869.

My invention relates to steam generators and an object of my improvements is to provide a compact and easily assembled water tube boiler having an improved circulation and one that does not prime. To this end, I provide spiral tubes, each spire consisting of lor'fg, straight, parallel, vertical sides with a short turn at each end. Across the top and bottom of each spiral I place a straight tube, each spire opening to such straight tube at the highest and lowest parts of the curved portions at the top and bottom, so that water flows past said opening in the spiral tube, while the generated steam is permitted to pass out laterally into the upper straight tube.

I secure this object in the apparatus illustrated in the accompanying drawing, in

, which Figure 1 is a plan view of an apparatus embodying my invention, the upper part of the encasing wall being broken away showing the construction of the interior apparatus.

Fig. 2 is a section on the line 11-11, Fig. 1..

Fig. 3 is a detail section in the plane indicated by the line III-III, Fig. 2.

Fig. 4 is a section on the broken line IVIV -IVIV, Fig. 3.

Fig. 5 is a detail section on the line VV, Fig. 1.

Fig. 6 is a perspective view partly broken away and with the upper cross tube shown in broken lines, of a coil constituting the major part of one of the heating sections.

a, a indicate the enclosing wall of the gererating apparatus. b is the supply header. 0 is the lower transverse tube of the heating unit. (23 is a tube constituting the main part of the first and every alternate section of the heating unit. d is the corresponding tube of the second section and every alternate section beyond that. The tube d is wound in a spiral with elongated coils or spires, as shown most distinctly in Fig. 6. This provides long, vertical and substantially parallel parts joined by arcuate sections at either end. These sections are cut away, as shown at d to fit against the transverse tubular portions 0 and c rovided with cut-away portions correspon ing to the cut-away portions d of the tubular portion 1%. The spiral pipe d is joined to the transverse portions 0 and 0 by' welding, the opening d registering when adjusted to position the two tubular portions of the sections intermesh one with the other, as shown in Fig. 1, so that the vertical portions of one of the spiral tubes upon one side thereof come into or even somewhat within the adjacent vertical portions of the next spiral tube.

e and e are tubes wound in horizontal coils placed above the main generating plant and adjacent thereto in horizontal planes. 6 indicate risers which communicate with the headers e and e -and with the crosspieces 0 between spires or coils of the spiral portion of the heating apparatus.

The operation of the above-described apparatus is as follows:

The hot gases are passed over the transverse tubes 0, 0 and around and surrounding the spiral tubes d and 01 The water is supplied from the pipe I; and connecting pipe.

I) c to the lower parts a and normally rises to the level indicated in Fig. 2. The water is heated from the hot gases and steam rapidly generated. The generation of steam causes the water to move and be distributed throughout the containing pipe. It will be observed that the path for the water through each of the spires (Z and d is a consecutive one, that it may travel consecutively along the spiral without interruption intermediate its ends,

or if there is no deflecting cause it may pass from one spire or coil to the other through a transverse tube 0 or 0 the heat distributes the water through the tubes (Z, 0Z 0, 0 and the entire suface of these tubes acts as a heating and generating surface. The water is projected past the entrances to the headers e and e so that only steam enters said headers and the hot gases surrounding the coils constituting the header superheats the dry steam therein.

I have found by actual experiment that this construction produces a generating plant that not only supphes perfectly dry steam but in which the steam 1s generated with greater facility than in other constructions and in which the water level is practically constant.

The design also facllitates assembly and constructing of the sections. A cross-plece c or c is formed with apertures therein; the r spiral part d or d is formed with apertures 03 therein. The two parts are then placed together as units and the joints welded.

, distance where it joins the header, the lower wall being continuous, and the body of water flowing upward in the coil is projected thr ugh the header into the continuation of said coil upon the opposite side of the header. The construction is the same at the bottom end and the action is analogous.

The tubes are flexible so that they may expand with the rise of temperature, and foreign matter may be removed easily through the end of a transverse member.

The coils haveparallel sides which are straight and are curved at their ends so that when wound in opposite directions the coils will be at right angles to each other, and will intermesh so as to bring the parallel headers close together.

What I claim is:

1. A steam generator having a water pipe bent into a spiralwith'upright coils, a transverse tubular member extending above said coils, each of said coils opening to said transverse member so that the water moving in each of said spiral coils shall pass by said opening while permitting the steam to escape-laterally through said opening into said transverse member.

2.. A steam generator having a water pipe bent into a spiral with upright coils having straight, parallel uprights and short curves at the top and bottom, a transverse member extending above said coils and said coils opening laterally into said transverse member'so that the moving water shall pass along said spiral pipe and the steam escape laterally into said transverse pipe.

3. In a generating plant, a water container consisting of a transverse tubular member having its walls cut away at intervals,

a member wound in a spiral form having each of its coils cut away to correspond to the cut-away portions of the first-mentioned member, said spiral member engagingthe members, and a riser extending upward from the upper transverse member so that it shall not be above the junction point of the transverse and tubular member.

In testimony whereof, I sign this specification.

I LEO I. KELLY. 

